Mobile accounting device



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ori'gal Filed July 1o, 1942 2 sheets-sheet;

prlg, l946 A. K. WATSON ET AL n 2,3939@ v MOBILE ACCOUNTING DEVICEOriginal Filed July l0, 1942 2 Sheets-Sheet 2' ATTORNE Patented Apr. 9,1946 UNITED STATES PATENT OFFICE MOBILE ACCOUNTING DEVICE Originalapplication July 10, 1942, Serial No. 450,470. Divided and thisapplication January 9, 1945, Serial No. 572,066

3 Claims.

This application is a division of our copending application Serial No.450,470, led July l0, 1942, for Mobile accounting devices.

The invention relates generally to devices adapting accounting machinesfor operation in vehicles and more particularly to means forilluminating tabulating equipment in trailers for military use.

.An object of the invention is the provision of black-out lighting forconcealing the location of the mobile accounting unit at night. Theinterior of the accounting trailer is provided with two sets of lights,the ordinary illuminating bulbs and a set of darkened bulbs which areused only in those intervals when the door of the trailer is opened.Hand switches are provided for use in the even of an alert to bring intooperation a substitute control of lights. The alternation from use ofordinary lights to colored lights and vice versa is automaticallyenforced by a door switch which is situated near the door opening so asto come into operation upon the slightest movement of the door. Theordinary lights are turned off and the colored lights turned on beforethere is any perceptible opening seen from the outside.

Another object of the invention is the provision of a black-out controlrelay and wiring therefor. The wiring for the black-out relay includes acommon line and an armature common to two relay contacts, said wirebeing connected from the armature to a hand switch for ordinary lights.The arrangement is such that the common wire is part of the circuitsthrough the ordinary lights, the black-out lights, a door switch and therelay. A set of ordinary lights are connected to a power source throughnormally closed relay contacts. Upon operation of the door the relay ismade eiiective to cause automatic transferal of current from theordinary lights to the black-out lights.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, the principle of the invention andthe best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. l is a plan view of the interior of the trailer showing thearrangement of machines around the walls and the location of the doorswitch.

Fig. 2 is a wiring diagram showing the arrangement of lines, controlswitches and black-out relay for automatically controlling dimming oflights under control of the door operation.

In Fig. 1 is shown the arrangement of accounting machines and filingcabinets around the inner walls of the trailer body 20. They may beidentied in the order of use in a clockwise direction starting at theupper left hand corner with a card sorter 2|, a filing cabinet 22, acard interpreter 23, a card grouping collator 24, a card perforatingreproducer 25, a data accumulating and report printing alphabettabulator 26, a iiling cabinet 2l, a card perforating duplicating punch28, another sorter 29, and a card iile cabinet 30. At the one end of thetrailer is a pair of outwardly swinging doors 32 and 33 giving access tothe center of the trailer iioor 3l which is normally clear since themachines are held close to the walls of the vehicle body. An emergencydoor 34 is provided at the opposite end of the trailer.

The various filing and card holding cabinets are secured directly to thefloor of the Vehicle and against the walls of the vehicle body, but theaccounting machines are removably secured to the floor and walls so thatthey may be drawn out into the center of the vehicle for changes inplugging and adjustments as well as for servicing. Each machine isprovided with four shock absorbing feet which are attached to slidingrunners movably held in skid channels which are secured to the floor ofthe vehicle.

In addition to the machine carrying trailer shown in Fig. 1, anothertrailer is provided as an administration oiiice wherein all informationand data are analyzed and transferred to the record cards which areperforated. Other vehicles carry electric current generating equipmentto furnish lighting current for the trailers and motive power for theaccounting machines.

Fig. 2 is a wiring diagram showing the electrical controls governing thelighting circuits and the motive power for the accounting machines, fansand heaters provided in the trailers. A source of power is indicated atthe point PS from whence lines are carried into a fuse boX FB and thenconnected to a pair of lines and 8| associated with a set of handswitches on a switch board 82 which may be located on the inner wall ofthe trailer or at a remote point and connected by a cable with thelighting and machine controls inside the trailer. Remote control isuseful to effect immediate switch operation at an air raid detectionpost.

Inside the trailer a series of ordinary bright overhead lights BR areprovided and connected in parallel by Wires 83 and 84. The circuit forthese ordinary lights passes through a normally closed contact 85 of ablack-out relay BK and the contact members of a hand switch LS. When thehand switch LS is closed, a circuit is established as follows: throughthe eight ordinary lights BR, wire 84, contacts 85, armature 81, wire86, switch member LS and line 88. Then from the other line 8| thecurrent continues through the other side of switch LS, over a crosswire88 to the light wire 83 and the overhead lights BR.

Other black-out lights BL and BL are provided and connected selectivelyunder control of relay BK when a black-out hand switch BS is closed. Forthe purpose of black-out control, a door operated switch DS is providedand a plunger 98 therein is connected with a pair of contacts 9| whichare normally opened when the door is closed.

Referring to Figs. 1 and 2, it may be noted that the switch DS issuspended above the outwardly swinging door 32 by a bracket 92 fastenedinside the door frame above the Widely swinging side of the door. Theswitch is located as it is purposely in order that the contacts may beoperated by the smallest displacement of the door so that the brightlights are switched off when the door swings the slightest amount towardan open position. In fact, switching takes place from the bright lightsto the black-out lights before there is any perceptible crack or openingbetween the doors 32 and 33 when viewed from the outside.

Turning back to consideration of the circuit between the door switch andrelay BK (Fig. 2), it is noted that the relay coil BK is connected withcontacts 9| by a wire 94 and the other side of Coil BK is connected towire 86 which, as already noted, has connections to switch LS and line88. Contacts 9| are connected to the other line 8| through a wire 95connected to a blackout line wire 96 attached to one termina1 of theblack-out hand switch BS. The relay control circuit continues throughthe switch and crosswire 88 and through the other hand switch LS to line8|.

From the foregoing description of the relay control circuit, it isevident that when contacts 9| are closed due to the opening of thetrailer door, relay BK is energized, and armature 81 shifts to opencontacts 85, disabling the ordinary lights, and closes contacts 91 toilluminate the dim black-out lamps BL and BL. The blackout lightingcircuit through contacts 91 and switch BS include line 80, switch LS,wire 86, armature 81, contacts 91, wire 99, switch BS, wire 98, lightbulbs BL and BL', wire 96, switch BS, wire 8S, switch LS and line 8|. Itshould be noted that wire 86 is common to a number of the lightingcontrol circuits. It forms Part of the ordinary lighting circuit, theblack-out lighting circuit, and the door switch and relay controlcircuit. v

The other hand switches on switchboard 82 are provided in pairs for thecontrol of the machine plug outlets, the heater control circuits and theexhaust fan operating motors. Switch A, when closed, sends currentthrough wires |88, |8| leading to machine plug outlets SI, S2, S3, S4,S5 and S6. The other hand switch A causes connections between the powerlines and wires |82, |83 leading to plug sockets S1, S8, S9. Handswitches B and B are closed to energize one or both of the heaters H andH. The two remaining hand switches C and C are effective to call intooperation the exhaust fans F and F.

Wired in parallel with the plug sockets S1, S8 and S8 across the wires|02, |83, is a step illuminating black-out light SBL attached to theoutside of the trailer in position to illuminate the steps leading up tothe doors 32 and 33 shown in Fig. l.

While there have been shown and described and pointed out thefundamental novel features of the invention as applied to a singlemodication, it will be understood that various omissions andsubstitutions and changes in the form and details of the deviceillustrated and in its operation may be made by those skilled in the artwithout departing from the spirit of the invention. It is the intentiontherefore to be limited only as indicated by the scope of the followingclaims.

What is claimed is:

l. In an illuminating system, a series of ordinary lights, dim black-outlights, a door operated switch, a relay controlled by said switch, apower source, a hand switch for connecting said ordinary lights to saidpower source through normally closed contacts of said relay, a secondhand switch for making said relay eiective under control of said doorswitch, whereby opening of the door causes opening of said contacts toout out the ordinary lights while other relay contacts in series withsaid dim black-out lights are closed to connect the blaclvout lights tothe power source.

2. In an illuminating system, a power source, a door operated switch, arelay controlled by said switch and having two contacts one of which isnormally closed, a set of ordinary lights connected to said power sourcethrough said normally closed contacts, and a set of dim blackout lightsconnected to said power source through the normally open Contact of saidrelay, whereby operation of said door causes relay operation andautomatic transferal of current from the ordinary lights to theblack-out lights.

3. The combination set forth in claim l, wherein said relay includes anarmature common to both relay contacts, and a wire connected from saidarmature to the hand switch of the ordinary lights, said wire beingcommon to the circuit through said ordinary lights, the circuit throughsaid black-out lights and the circuit including said door switch andrelay.

ARTHUR K. WATSON. WILLIAM L. LEWIS. JAMES L. WALSH.

